46557578021 has 4 divisors (see below), whose sum is σ = 46562743500. Its totient is φ = 46552412544.

The previous prime is 46557577999. The next prime is 46557578027. The reversal of 46557578021 is 12087575564.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27261312100 + 19296265921 = 165110^2 + 138911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-46557578021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46557578027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2569196 + ... + 2587253.

It is an arithmetic number, because the mean of its divisors is an integer number (11640685875).

Almost surely, 2^46557578021 is an apocalyptic number.

It is an amenable number.

46557578021 is a deficient number, since it is larger than the sum of its proper divisors (5165479).

46557578021 is an equidigital number, since it uses as much as digits as its factorization.

46557578021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5165478.

The product of its (nonzero) digits is 2352000, while the sum is 50.

The spelling of 46557578021 in words is "forty-six billion, five hundred fifty-seven million, five hundred seventy-eight thousand, twenty-one".